Bokudo Murakami, a renowned and potent psychic, possesses the unique ability to detect the presence of the Demon virus within infected individuals. He identifies this infection within Masajuro Tabe, a prominent politician, exposing Tabe's monstrous transformation and cannibalistic urges. This revelation triggers Tabe's hunt for Bokudo, seeking information and a potential cure.

As Sayaka Murakami's grandfather, Bokudo's subsequent disappearance compels her to search for him, drawing scientists Komada and Koshigaya into the quest. He dedicates himself to spiritual purification, practicing meditation under waterfalls to combat the virus's influence through traditional methods. His profound psychic abilities and esoteric knowledge establish him as a vital figure in understanding the virus's supernatural dimensions, offering a distinct counterpoint to the protagonists' scientific approach.

During a confrontation at his temple, Bokudo confronts Tabe directly, delivering a speech that attributes the politician's irreversible transformation to his own innate corruption and lust for power, which blocked the virus's cure. Shortly after this encounter, Bokudo falls victim to an assault on the temple led by Tabe's forces. His death leaves a significant legacy through his granddaughter and fuels the ongoing battle against the Demon virus.

Bokudo's insights, notably labeling the virus's advanced stages as "Devil-Possessed," along with his steadfast spiritual practices, underscore the narrative's fusion of supernatural horror and scientific investigation. Though his pivotal role concludes with his demise, it decisively shapes the story's trajectory and the motivations of the surviving characters.